Pipe cutter



June 26, 1945. PAVEY 2,379,177

PIPE CUTTER Filed Nov. 17, 1944 2 Sheets-Sheet 1 M v, V

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By I I 3M0 2 Sheets-Sheet 2 1.. J. PA E PIPE CUTTER Filed Nov. 17, 1944June 26, 1945- gw Mzaw d lesz er JPmy Patented June 26, 1945 UNITEDSTATES PATENT OFFICE 2,379,177 V a PIPE CUTTER Lester J. Pavey,OkIahoina City, ,1 7 Application November 17, 1944, Serial No. 563,940

7 {Claims torso-99) f f The present inventionrelates to new and'useful'improvements in ratchet pipe cutters for use particularly in ditches andother comparatively close inaccessible places, and has for its primaryobject to provide,'in a manner as hereinafter set forth, a tool of thischaracter which is adapted to be expeditiously engaged with a pipe atany desired point.

Another very important object of the invention is to provide a ratchetpipe cutter of the aforementioned character which embodies a uniqueconstruction and arrangement of cutting disk and feed screw therefor.

Figure 1 is a view in side elevation of a ratchet pipe cutterconstructed in accordance with the present invention, a portion of thedevice being broken away in section. a

Figure 2 is a, sectional view, taken substantially on the line 2-2 ofFigure 1.

Figure 3 is an elevational view of the device, taken at right angles toFigure 1. I

Figure 4 is a fragmentary view in elevation, looking at the device fromthe line 4-4 in Figure 1.

Figure 5 is a detail view in section, taken substantially on the line 55of Figure 1.

Figure 6 is a detail viewof the cutting disk and the mounting therefor.

Referring now to the drawings in detail, it will be seen that theembodiment of the invention which has been illustrated comprises ametallic ring I of suitable dimensions. As illustrated to advantage inFigure 2 of the drawings, the ring I is substantially c-shaped intransverse section and comprises a removable side member 2. The ring Ifurther includes a swinging segment 3 which is hingedly connected at 4to the main body of said ring. Mounted radially on the ring I is anoperating handle 5. Any suitable means may, if desired, be provided forsecuring the hinged segment 3 in closed position.

Rotatably mounted in the ring I and projecting inwardly therefrom is anannular ratchet 6.

The annular ratchet 8 includes a separate section I which is adapted tobe positioned in the segment 3 for swinging movement therewith when thetool is opened for engagement with or disengagement from the pipe to becut, as at 8. A reversible spring-pressed pawl 9 is slidably mounted onthe ring segment 3 for engagement with the ratchet 6 for operativelyconnecting the ring I thereto.

A substantially U-shaped metallic frame I0 is rigidly secured at II onone side of the ratchet 6. Journaledat I2 in the frame In is aswingingarm I3 havingon its free end portion'a housing I4 in which a disk cutterI5 is journaled. "A thumb screw I6 is threadedly mounted in one endportion of the frame I0 and engaged with the housing I4 for feeding thedisk cutter I5 to the pipe 8. A spring I1 is mounted on the frame I0 andengaged with the arm I3 for maintaining the housing I4 in engagementwith the feed screw I6. Rollers I8 ar journaled in the other end portionof the frame III for travel about the pipe 8.

It is thought that the manner in which the device is used will bereadily apparent from a consideration of the foregoing. I Briefly, toengage the tool with the pipe to be cut, the segment 3 of the ring I,with the section I of the annular ratchet 6 therein, is swung outwardlyto open position. Thus, the head assembly of the tool is applied to thepipe at any desired intermediate point. With th pipe 8 engaged betweenthe rollers I8 and the cutting disk I5, the feed screw I6 is tightenedto properly adjust said cutting disk on the pipe. The segment 3 of thering I is, of course, closed and the cutting operation may begin. Thering I is rotated in one direction through the medium of the handle 5and the pawl 9 rotates the annular ratchet 6 in unison with said ring.Thus, the cutting disk I5 is caused to travel around the pipe 8. When thhandle 5 is swung in the opposite direction with the ring I, the pawl 9rides over the teeth of the annular ratchet 6 to obtain a new holdthereon and the operation is repeated. As the cutting of the pipe 8progresses, the disk I5 is fed thereto'through the medium of the thumbscrew I6. A spacer I9 is provided between the frame I0 and the innerportion of the annular ratchet 6 on which said frame is mounted.

It is believed that the. many advantages of a ratchet pipe cutterconstructed in accordance with the present invention will be readilyunderstood, and although a preferred embodiment of the device is asillustrated and described, it is to be understood that changes in thedetails of construction may be resorted to which will fall within thescope of the invention as claimed.

What is claimed is:

l. A pipe cutter of the character-described comprising a ring adapted torotatably encircle a pipe,an annular ratchet rotatably mounted insaidring and adapted to encircle the pipe, a pawl operatively connecting thering to the ratchet, a frame fixed on one side of the ratchet, rollersjournaled on the frame and operable on the pipe,

a cutting disk mounted for swinging movement 0n,the frame, and a screwthreadedly mounted on the frame and operatively engageable with the diskfor feeding same to the pipe.

2. A pipe cutter of the character described comprising a ring adapted toencircle a pipe to be cut, an operating handle on the ring, an annularratchet rotatably mounted in the ring and adapted to encircle the pipe,a pawl on the ring engageable with the ratchet for actuatingsaidratchetin one direction with the ring, a substantially U-shaped frame fixed onone side of the annular ratchet, rollers j ournaled on the frame andoperable on the pipe, an arm pivotally mounted on the frame, a housingon one end of the arm,:a cutting disk journaled in said housingiandengageable with the pipe, and a "thumb screw threadedly mounted inoneend ,portion tofithe frame and engaged with the housing for feedingthe cutting disk to the pipe.

.3. ,A pipe cutter of the character described comprising a ring \ofsubstantially C-shaped transverse section adapted'toencircle' a pipe tobe cut, an operating handle radiating from the ring, an annular ratchetrotatably mounted in the ring, the inner portion of said annular ratchetbeing free of said ring, a pawl slidably mounted on the periphery of thering and engageable with the ratchet for actuating same in one directionwith said ring, a substantially U-shaped frame mounted on the free innerportion of the ring on one side thereof, rollers journaled on one endportion of the frame and operable on the pipe,

an arm pivotally mounted for swinging movement on the frame at anintermediate point, a housing integral with th free end of said arm,

a cutting disk journaled in said housing and engageable with the pipe, athumb screw threadedly mounted in the other end portion of the frame andengageable with the housing for feedscrew.

LESTER J. PAVEY.

